Currently, I am only using the combo box for navigation.
For other projects I'd like the same capability to be based on a grid.
In any case, It seems as though I am fighting with the ADO.NET currency manager.

Use case:
1. User selects a Batch from the combo box on the List tab of the mmMaintenanceForm
2. Combo box changes to display the Batch Description (value stores the Batch Id)
3. All other fields on the Properties tab of the mmMaintenanceForm "navigate" to display the information from the same Batch Id value from the Combo box on the List tab.
4. User, while on the Properties tab, uses the navigation toolbar to navigate to the next record.
5. User selects the List tab and views the Batch Description of the Batch that was just "navigated" to on the Properties tab.

THANKS - hope the class is going well - wish I could have attended!!!